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Image Search Results
Journal: The Journal of Biological Chemistry
Article Title: Regulation of Beclin 1 Protein Phosphorylation and Autophagy by Protein Phosphatase 2A (PP2A) and Death-associated Protein Kinase 3 (DAPK3)
doi: 10.1074/jbc.M115.704908
Figure Lengend Snippet: ROS-MK2 signaling is not involved in OA-induced Beclin 1 Ser-90 phosphorylation. A and B, HeLa cells were pretreated with or without ROS scavengers, MnTBAP (10 μm) and EUK134 (10 μm), for 30 min and treated with OA (100 nm) for 6 h. A, the level of ROS production was analyzed by a total ROS detection kit. BF, bright field. B, the level of Beclin 1 Ser-90 phosphorylation was analyzed by immunoblotting. Representative images from two and three independent experiments are shown. C, HeLa cells were treated with anisomycin (25 μg/ml) for 30 min or OA (100 nm) for 6 h. The levels of MK2 activation (shown by a band shift), Beclin 1 Ser-90 phosphorylation, and HSP27 Ser-82 phosphorylation were analyzed by immunoblotting. Representative images from three independent experiments are shown. D, MCF7 cells stably expressing FLAG-Beclin 1 WT were treated with the AMPK activator 5-aminoimidazole-4-carboxamide ribonucleotide (AICAR) (1 mm) for the indicated time periods. FLAG-Beclin 1 was immunoprecipitated (IP), and the phosphorylation of Beclin 1 Ser-90 was detected by immunoblotting. Representative images from three independent experiments are shown. E, 293T cells were transfected with empty plasmid or FLAG-tagged constitutively active (CA) AMPK. Beclin 1 Ser-90 and raptor Ser-792 phosphorylation was analyzed by immunoblotting. Representative images from two independent experiments are shown. F, MCF7 cells stably expressing FLAG-Beclin 1 WT were treated with the mTORC1 inhibitor rapamycin (100 nm) for the indicated time periods. FLAG-Beclin 1 was immunoprecipitated, and the phosphorylation of Beclin 1 Ser-90 was detected by immunoblotting. Thr-389 phosphorylation of S6K was analyzed to show the inhibitory effects of rapamycin on mTORC1. Representative images from three independent experiments are shown. WCL, whole cell lysate.
Article Snippet: Cells were pretreated with ROS scavengers,
Techniques: Phospho-proteomics, Western Blot, Activation Assay, Electrophoretic Mobility Shift Assay, Stable Transfection, Expressing, Immunoprecipitation, Transfection, Plasmid Preparation